Finding the Fourth Proportional to 1,555.83, 2,146.73 and 1,224.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.83 : 2,146.73 = 1,224.09 : x
2. Step 2: Convert to fraction form
   1,555.83/2,146.73 = 1,224.09/x
3. Step 3: Cross multiply
   1,555.83x = 2,146.73 × 1,224.09
4. Step 4: Simplify right side
   1,555.83x = 2,627,784.61
5. Step 5: Solve for x
   x = 2,627,784.61/1,555.83
6. Step 6: Final answer
   x = 1,688.99